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Digital video frequency watermark method based on error correcting code

A technology of digital video and error correction code, applied in the direction of digital video signal modification, television, color television, etc., can solve the problems of neglecting watermark information and embedding watermark information, and achieve the effect of enhanced robustness and strong applicability

Inactive Publication Date: 2005-06-22
洛阳中科信息产业研究院
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Existing digital video watermarks often only focus on embedding the watermark information into the luminance component, and pay little attention to how to restore the damaged watermark information after the attack

Method used

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  • Digital video frequency watermark method based on error correcting code
  • Digital video frequency watermark method based on error correcting code
  • Digital video frequency watermark method based on error correcting code

Examples

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Comparison scheme
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Embodiment Construction

[0017] The process of embedding a watermark is as follows: figure 1 As shown, the specific steps are:

[0018] 1. Generate error correction information R from watermark information W according to error correction code algorithm G.

[0019] 2. Video data D is separated into luminance information (Y) and chrominance information (commonly used are UV, CrCb, IQ, etc.)

[0020] 3. Using Algorithm E 1 ,E 2 ,E 3 Embed watermark information W and error correction information R into brightness information and chrominance information respectively. E. 1 ,E 2 ,E 3 Can be the same or different.

[0021] 4. Synthesize the luminance information embedded with watermark information and the chrominance information embedded with error correction information into video data D'.

[0022] The process of extracting watermark is as follows: figure 2 As shown, the specific steps are:

[0023] 1. The embedded watermark video data D is separated into luminance information (Y) and chrominance...

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PUM

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Abstract

The method includes following steps. Embedding step: embedded information includes error correction information of watermark. Picking-up step, error correction algorithm is utilized to recover damaged watermark information. The embedded field includes brightness and chromaticity of video data, fully utilizing of available space. Different modes of embedded watermark information and correction information can be adopted so as to enhance robustness. It is optional to embed original video data or compressed video data so as to possess high applicability. Increasable new algorithm for embedding watermark makes it upgradeable.

Description

technical field [0001] The invention relates to watermark technology, in particular to a digital video watermark method based on an error correction code. technical background [0002] With the rapid development and wide application of multimedia technology and network technology, images, audio, video and other multimedia works can be obtained in digital form, and it becomes very easy to make perfect copies, which brings great benefits to people's work, study and life. Life has brought great convenience, but it may also lead to large-scale unauthorized copying, which is likely to damage the healthy development of publishing industries such as music, movies, books and software. Digital watermarking technology is proposed in response to this problem. Copyright information such as numbers, serial numbers, text, and image logos are embedded into multimedia data to protect copyrights, secret communications, authenticity identification of data files, and product logos. effect. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/387H04N1/64H04N5/913H04N9/80H04N19/467
Inventor 彭聪李锦涛林守勋黄晁邹潇湘刘书昌
Owner 洛阳中科信息产业研究院
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